its not 500watts and 6825 lumens for 1 cfl seems a lil far fetched also unless it really is 500w but i could be wrong...im using cfls 2-42w,1-26w and 1-15w and also a 20w sunshine floro tube and i NEED more light and my plants are like 4"....i agree with butter...if you want GOOD bud and not fluffy reggo bud then get A LOT more light for flower...i dont think it matters much 4 veg